Response to drought stress of MaPIP1;1 -overexpressing transgenic Arabidopsis plants. Photographs (A) and statistical analyses (D) of the primary root length of WT and transgenic lines under normal or osmotic conditions. Photographs (B), survival rates (C) and water loss rates (F) of WT and transgenic mature plants grown under drought or dehydration conditions. (E) The number of root hairs of WT and transgenic lines under normal or osmotic conditions. Data are means ± SE of n = 4 biological replicates. Means denoted by the same letter do not significantly differ at P < 0.05 as determined by Duncan’s multiple range test.